<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <title>Minimal size for a horizontal arrow stretched by scaling</title>
  </head>

  <body>

    <table style="position: absolute;">
      <tr align="center">
        <td><div style="width: 200px; height: 5px; background: black"/></td>
      </tr>
      <tr align="center">
        <td>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <munder>
              <mspace width="100px" height="5px" style="background: yellow"/>
              <mo style="color: blue;">&#x21DB;</mo>
            </munder>
          </math>
        </td>
      </tr>
    </table>

    <table style="position: absolute;">
      <tr align="center">
        <td><div style="width: 200px; height: 5px; background: black"/></td>
      </tr>
      <tr align="center">
        <td>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <munder>
              <mspace width="100px" height="5px" style="background: yellow"/>
              <mspace width="88px" height="25px" depth="25px"
                      style="background: green;"/>
            </munder>
          </math>
        </td>
      </tr>
    </table>

  </body>
</html>
